Answer:
Select Yes or No to tell whether each method results in a random sample of the population.
1. The owner uses a database to print the names of all clients on slips of paper. The owner chooses 20 of the slips of paper without looking.- yes
3. The owner sends a survey to every client who spent more than $500 with the catering company in the past year. - no
4. The owner sends a survey to all clients whose phone number ends in 5.- yes
5. The owner sends a survey to the last 20 clients who used the catering company's services.- yes